5 Leva Srebro

Bulgaria's 1899 silver-backed leva notes — "Srebro" meaning silver — were issued under the convertibility provisions of the Bulgarian National Bank's founding statutes, which obligated the bank to maintain a metallic reserve against its circulating paper. The Bradbury, Wilkinson engraving is characteristically fine for the period; the firm was among the most technically accomplished security printers in Europe at the time and handled commissions from numerous newly independent states seeking internationally credible paper currency.

Bulgaria had only gained full independence from Ottoman suzerainty in 1908 — this note predates that by nearly a decade, issued while the country was still nominally a principality under nominal Ottoman suzerainty. The "Srebro" designation was not decorative; it carried legal weight under the bank's charter.